逆流开式冷却塔热力阻力计算书

冷却塔热力阻力计算书,,,,,,,,,,,,,,,

计算依据：GB/T50392-2006机械通风冷却塔工艺设计规范,,,,,,,,,,,,,,,

计算程序：EXCEL,,,冷却塔型号：,,,,,,数据输入：,,,,,,

设计参数,,,,,,,,,,,,,,,

大气压,P,92.3,Kpa,风筒底径,6.66,m,单塔长度,10,m,,,,,,

干球温度,θ,31.2,℃,风筒顶径,6.48,m,喷淋高度,0.5,m,,,,,,

湿球温度,τ,20,℃,风筒中径,6.06,m,气室高度,1.7,m,,,,,,

处理水量,Q,1300,m3/h,,,m,风筒高度,2,m,,,,,,

进水温度,t1,31,℃,,,m,总高,10.45,m,,,,,,

出水温度,t2,24,℃,,,,平台高,8.45,m,,,,,,

风机直径,D,6,m,风机数量,1,台,喷头个数,144,个,,,,,,

轮毂直径,d,1,m,填料高度,1.25,m,单个流量,9.027777778,m3/h,,,,,,

淋水面积,F,80,m2,,,,喷嘴压力,0.03,Mpa,,,,,,

进风口高度,,5,m,,,,,,,,,,,,

热力计算,,,,,,,,,,,,,,,

湿球绝对温度：Tτ=273.16+τ=,,,,,293.16,,K,,,,,,,,

饱和水蒸汽压的计算公式：,,,,,,,,,,,,,,,

"lgP""=2.0057173-3142.305/T+3142.305/373.16-0.0024804*373.16+0.0024804*T+8.2lg(373.16/T)",,,,,,,,,,,,,,,

"湿球温度时的饱和水蒸汽压对数：lgP""τ=",,,,,0.368627186,,,,,,,,,,

"湿球时饱和水蒸汽压P""τ=",,,2.336830359,,Kpa,,,,,,,,,,

干球绝对温度：Tθ=273.06+θ=,,,,,304.36,,K,,,,,,,,

"干球温度时的饱和水蒸汽压对数：lgP""θ=",,,,,0.657321946,,,,,,,,,,

"干球时饱和水蒸汽压P""θ=",,,4.542782523,,Kpa,,,,,,,,,,

"空气相对湿度φ=[P""τ-0.000662P（θ-τ）]/P""θ=",,,,,,,,0.363759707,,,,,,,

"进塔干空气密度ρ1=（P-φP""θ）*103/[287.14（273+θ）]=",,,,,,,,1.037774548,,kg/m3,,,,,

选用气水比λ,,0.717,0.767,0.817,0.867,,0.917,,,,,,,,

风量G,,898171.9602,960805.9881,1023440.016,1086074.044,,1148708.072,m3/h,,,,,,,

"进塔湿空气比焓：h1=1.005θ+0.622（2500.8+1.846θ）*φ*P""θ/（P-φ*P""θ）=",,,,,,,,,,60.36539241,KJ/kg(DA),,,,

蒸发带走热量系数：K=1-t2/[586-0.56(t2-20)]=,,,,,,,0.958887214,,,,,,,,

不同气水比出塔湿空气比焓：h2=h1+4.1868(t1-t2)/(Kλ)=,,,,,,,,,,,,,,,

,,102.9932565,100.2143866,97.77564766,95.61819349,,93.6960124,KJ/kg(DA),,,,,,,

进水绝对温度：T（t1)=273.16+t1=,,,,304.16,K,,,,,,,,,,

"进水温度时的饱和水蒸汽压对数：lgP""t1=",,,,,0.652378037,,,,,,,,,,

"进水时饱和水蒸汽压P""t1=",,,4.491361758,Kpa,,,,,,,,,,,

"出塔饱和空气比焓：h""2=",,,112.538457,KJ/kg(DA),,,,,,,,,,,

温差分段数：n=,,8,一般水温差＜15℃常取n=2就可以保证精度了,,,,,,,,,,,,

温差等分值:δt=,,0.875,℃,,,,,,,,,,,,

δh=(h2-h1)/n=,,5.328483008,4.981124272,4.676281905,4.406600135,,4.166327499,,,,,,,,

t1-δt=,,30.125,℃,,,,,,,,,,,,

t1-2δt=,,29.25,℃,,,,,,,,,,,,

t1-3δt=,,28.375,℃,,,,,,,,,,,,

t1-4δt=,,27.5,℃,,,,,,,,,,,,

t1-5δt=,,26.625,℃,,,,,,,,,,,,

t1-6δt=,,25.75,℃,,,,,,,,,,,,

t1-7δt=,,24.875,℃,,,,,,,,,,,,

T1=273.16+t1-δt=,,,303.285,℃,,,,,,,,,,,

T2=273.16+t1-2δt=,,,302.41,℃,,,,,,,,,,,

T3=273.16+t1-3δt=,,,301.535,℃,,,,,,,,,,,

T4=273.16+t1-4δt=,,,300.66,℃,,,,,,,,,,,

T5=273.16+t1-5δt=,,,299.785,℃,,,,,,,,,,,

T6=273.16+t1-6δt=,,,298.91,℃,,,,,,,,,,,

T7=273.16+t1-7δt=,,,298.035,℃,,,,,,,,,,,

T(t2)=273.16+t2=,,,297.16,℃,,,,,,,,,,,

"T1温度时的饱和水蒸汽压对数：lgP""1=",,,,,0.630791522,,,,,,,,,,

"T1温度时的饱和水蒸汽压：P""1=",,,,,4.273576888,,Kpa,,,,,,,,

"T1温度时饱和空气焓：h""T1=",,,,,107.4724585,,KJ/kg(DA),,,,,,,,

"T2温度时的饱和水蒸汽压对数：lgP""2=",,,,,0.608931934,,,,,,,,,,

"T2温度时的饱和水蒸汽压：P""2=",,,,,4.063796335,,Kpa,,,,,,,,

"T2温度时饱和空气焓：h""T2=",,,,,102.5828627,,KJ/kg(DA),,,,,,,,

"T3温度时的饱和水蒸汽压对数：lgP""3=",,,,,0.586928177,,,,,,,,,,

"T3温度时的饱和水蒸汽压：P""3=",,,,,3.863030853,,Kpa,,,,,,,,

"T3温度时饱和空气焓：h""T3=",,,,,97.88599537,,KJ/kg(DA),,,,,,,,

"T4温度时的饱和水蒸汽压对数：lgP""4=",,,,,0.564778904,,,,,,,,,,

"T4温度时的饱和水蒸汽压：P""4=",,,,,3.670953672,,Kpa,,,,,,,,

"T4温度时饱和空气焓：h""T4=",,,,,93.3729815,,KJ/kg(DA),,,,,,,,

"T5温度时的饱和水蒸汽压对数：lgP""5=",,,,,0.542482753,,,,,,,,,,

"T5温度时的饱和水蒸汽压：P""5=",,,,,3.48724735,,Kpa,,,,,,,,

"T5温度时饱和空气焓：h""T5=",,,,,89.0353753,,KJ/kg(DA),,,,,,,,

"T6温度时的饱和水蒸汽压对数：lgP""6=",,,,,0.520038346,,,,,,,,,,

"T6温度时的饱和水蒸汽压：P""6=",,,,,3.311603601,,Kpa,,,,,,,,

"T6温度时饱和空气焓：h""T6=",,,,,84.8651354,,KJ/kg(DA),,,,,,,,

"T7温度时的饱和水蒸汽压对数：lgP""7=",,,,,0.497444288,,,,,,,,,,

"T7温度时的饱和水蒸汽压：P""7=",,,,,3.143723115,,Kpa,,,,,,,,

"T7温度时饱和空气焓：h""T7=",,,,,80.85460183,,KJ/kg(DA),,,,,,,,

"T(t2)温度时的饱和水蒸汽压对数：lgP""(t2)=",,,,,0.474699167,,,,,,,,,,

"T(t2)温度时的饱和水蒸汽压：P""(t2)=",,,,,2.983315382,,Kpa,,,,,,,,

"T(t2)温度时饱和空气焓：h""1=",,,,,76.99647455,,KJ/kg(DA),,,,,,,,

"理论冷却数：N=4.1868(t1-t2)/(3n)*[1/(h""1-h2)+4/(h""T1-(h2-δh))+2/(h""T2-(h2-2δh))",,,,,,,,,,,,,,,`

"+4/(h""T3-(h2-3δh))+2/(h""T4-(h2-4δh))+4/(h""T5-(h2-5δh))",,,,,,,,,,,,,,,

"+2/(h""T6-(h2-6δh))+4/(h""T7-(h2-7δh))+1/(h""2-h1)]",,,,,,,,,,,,,,,

不同气水比时N,,2.254409559,1.980674186,1.796947429,1.662749343,,1.558851636,,,,,,,,

S波填料设计，填料特性数Ω=2.12λ0.61,,,,,,,,,,,,,,,

填料特性数Ω,,1.730623298,1.803271143,1.874093763,1.943244783,,2.010856854,,,,,,,,

由上图曲线可知，当气水比λ=,,,,0.817,时，Ω＞N,,,满足,,,,,,,

设计容积散质系数βxv=NQ/(KV)=,,,,24884.8534,kg/m3.h,,,,,,,,,,

"填料容积散质系数β""xv=3710g0.584q0.355",,,,,,,,,,,,,,,

其中空气重量风速g=G*γ/3600/F=,,,,3.687847222,kg/m2.s,,,,,,,,,,

淋水密度q=Q/F=,,,16.25,m3/m2.h,,,,,,,,,,,

"填料容积散质系数β""xv=",,,21390.56422,kg/m3.h,,,,,,,,,,,

"填料容积散质系数β""xv＞设计容积散质系数βxv",,,,,,,,不满足,,,,,,,

结论：该逆流冷却塔的热力性能,,,,达不到,设计要求。,,,,,,,,,,

通风阻力及风机功率计算,,,,,,,,,,,,,,,

进风口面积,,,50,m2,进风口风速(≤4.0m/s),,,,5.685777867,m/s,,,,,

配水设备气流通过面积,,,72,m2,布水系统风速,,,,3.948456852,m/s,,,,,

收水设备气流通过面积,,,78.4,m2,收水段风速,,,,3.626133844,m/s,,,,,

淋水填料空隙面积,,,72,m2,淋水段风速,,,,3.948456852,m/s,,,,,

风筒收缩后断面积,,,27.489,m2,出风口风速,,,,10.34191471,m/s,,,,,

塔内湿空气密度γ=,,,1.050810664,kg/m3,进风口面积：淋水面积,,,,0.637755102,,,,,,

进风口阻力P1=0.55γV2/2,,,9.341937181,Pa,进风口高：填料径深（h:L）,,,,1,,,,,,

填料气流转弯P2=0.5γV2/2,,,3.317449283,Pa,,,,,,,,,,,

填料进口突然收缩P3=,,,0.0008497,Pa,,,,,,,,,,,

淋水填料,A=,2.14,,,,,,,,,,,,,

,m=,0.63,,,,,,,,,,,,,

淋水填料阻力P4=,,,51.75294349,Pa,,,,,,,,,,,

配水装置P5=,,,3.112668463,Pa,,,,,,,,,,,

收水装置P6=,,,18.01209835,